@use 'mixins/mixins' as *;
@use 'common/var' as *;

@mixin disable {
  cursor: not-allowed;
  opacity: 0.3;
}

@mixin alpha-bg {
  background-image:
    linear-gradient(
      45deg,
      getCssVar('color-picker', 'alpha-bg-a') 25%,
      getCssVar('color-picker', 'alpha-bg-b') 25%
    ),
    linear-gradient(
      135deg,
      getCssVar('color-picker', 'alpha-bg-a') 25%,
      getCssVar('color-picker', 'alpha-bg-b') 25%
    ),
    linear-gradient(
      45deg,
      getCssVar('color-picker', 'alpha-bg-b') 75%,
      getCssVar('color-picker', 'alpha-bg-a') 75%
    ),
    linear-gradient(
      135deg,
      getCssVar('color-picker', 'alpha-bg-b') 75%,
      getCssVar('color-picker', 'alpha-bg-a') 75%
    );
  background-size: 12px 12px;
  background-position:
    0 0,
    6px 0,
    6px -6px,
    0 6px;
}

@mixin color-picker-thumb {
  position: absolute;
  cursor: pointer;
  box-sizing: border-box;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  border-radius: 1px;
  background: #fff;
  border: 1px solid getCssVar('border-color', 'lighter');
  box-shadow: 0 0 2px rgba(0, 0, 0, 0.6);
  z-index: 1;

  &:focus-visible {
    outline: 2px solid getCssVar('color-primary');
    outline-offset: 1px;
  }
}

@mixin bar-background($side: right) {
  background: linear-gradient(
    to $side,
    #f00 0%,
    #ff0 17%,
    #0f0 33%,
    #0ff 50%,
    #00f 67%,
    #f0f 83%,
    #f00 100%
  );
}

@include b(color-picker-panel) {
  width: 300px;
  padding: 12px;
  box-sizing: content-box;
  background: getCssVar('bg-color', 'overlay');

  @include when(border) {
    border: solid 1px getCssVar('border-color-lighter');
    border-radius: 4px;
  }

  @include e(wrapper) {
    margin-bottom: 6px;

    @include e(footer) {
      display: flex;
      justify-content: space-between;
      margin-top: 12px;
      text-align: right;
      @include b(input) {
        line-height: 26px;
        font-size: 12px;
        color: $color-black;
        width: 160px;
      }
    }
  }

  @include when(disabled) {
    @include b(color-svpanel) {
      @include disable;
    }
    @include b(color-hue-slider) {
      @include disable;
    }
    @include e(thumb) {
      cursor: not-allowed;
    }
    @include b(color-alpha-slider) {
      @include disable;
    }
    @include b(color-predefine) {
      @include e(color-selector) {
        @include disable;
      }
    }
  }
}

@include b(color-predefine) {
  display: flex;
  font-size: 12px;
  margin-top: 8px;
  width: 280px;

  @include e(colors) {
    display: flex;
    gap: 8px;
    flex: 1;
    flex-wrap: wrap;
  }

  @include e(color-selector) {
    width: 20px;
    height: 20px;
    padding: 0;
    border-radius: getCssVar('border-radius-base');
    border: none;
    outline: none;
    overflow: hidden;
    cursor: pointer;

    &.selected {
      box-shadow: 0 0 3px 2px getCssVar('color-primary');
    }

    &:focus-visible {
      outline: 2px solid getCssVar('color-primary');
      outline-offset: 2px;
    }

    > div {
      display: flex;
      height: 100%;
    }

    @include when(alpha) {
      background-image: url();
    }
  }
}

@include b(color-hue-slider) {
  position: relative;
  box-sizing: border-box;
  width: 280px;
  height: 12px;
  background-color: #f00;
  padding: 0 2px;
  float: right;

  @include e(bar) {
    position: relative;
    @include bar-background;
    height: 100%;
  }

  @include e(thumb) {
    @include color-picker-thumb;
  }

  @include when(vertical) {
    width: 12px;
    height: 180px;
    padding: 2px 0;

    .#{$namespace}-color-hue-slider__bar {
      @include bar-background(bottom);
    }

    .#{$namespace}-color-hue-slider__thumb {
      left: 0;
      top: 0;
      width: 100%;
      height: 4px;
    }
  }
}

@include b(color-svpanel) {
  position: relative;
  width: 280px;
  height: 180px;
  background-image:
    linear-gradient(to top, #000, rgba(0, 0, 0, 0)),
    linear-gradient(to right, #fff, rgba(255, 255, 255, 0));

  @include e(cursor) {
    position: absolute;
    cursor: pointer;
    width: 4px;
    height: 4px;
    box-shadow:
      0 0 0 1.5px #fff,
      inset 0 0 1px 1px rgba(0, 0, 0, 0.3),
      0 0 1px 2px rgba(0, 0, 0, 0.4);
    border-radius: 50%;
    transform: translate(-2px, -2px);

    &:focus-visible {
      outline: 2px solid getCssVar('color-primary');
      outline-offset: 2px;
    }
  }
}

@include b(color-alpha-slider) {
  position: relative;
  box-sizing: border-box;
  width: 280px;
  height: 12px;
  @include alpha-bg;

  @include when(disabled) {
    @include e(thumb) {
      cursor: not-allowed;
    }
  }

  @include e(bar) {
    position: relative;
    background: linear-gradient(
      to right,
      rgba(255, 255, 255, 0) 0%,
      getCssVar('bg-color') 100%
    );
    height: 100%;
  }

  @include e(thumb) {
    @include color-picker-thumb;
  }

  @include when(vertical) {
    width: 20px;
    height: 180px;

    .#{$namespace}-color-alpha-slider__bar {
      background: linear-gradient(
        to bottom,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 1) 100%
      );
    }

    .#{$namespace}-color-alpha-slider__thumb {
      left: 0;
      top: 0;
      width: 100%;
      height: 4px;
    }
  }
}

.#{bem('color-picker-panel')} {
  @include set-css-var-value(('color-picker', 'alpha-bg-a'), '#ccc');
  @include set-css-var-value(('color-picker', 'alpha-bg-b'), 'transparent');
}

.dark {
  .#{bem('color-picker-panel')} {
    @include set-css-var-value(('color-picker', 'alpha-bg-a'), '#333333');
  }
}
